Packing device for shaft-bearings.



N0. 689,l46. Patented Dec. l7, l90l.

u. J. VAN BERGEN. PABKiNG DEVICE FOR SHAFT BEARINGS.

Application filed May 28, 1901.)

(No Model.)

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NITED STATES rrICE.

artist PACKING DEVICE FOR SHAFT-BEARINGS.

SPECIFICATION forming part of Letters Patent No. 689,146, dated December17, 1901.

Application filed May 23, 1901.

T0 ctZZ whom it may concern-.-

Be it known that I, Uno JURRIEN VAN BER- GEN, a subject of the Queen ofthe Netherlands, residing at 33 IIeiligerlee, Commune of Scheemda, inthe Kingdom of the Netherlands, have invented a certain new and usefulImproved Packing Device for Shaft-Bearings, of which the following is aspecification.

This invention relates to an arrangement for use in explosion-motors,more particularly in the l/Volverine two-stroke-cycle and like motors,wherein the casing in which the crank moves is at the same time arrangedas a chamber into which the explosive mixture is drawn and in which itis compressed. In motors of this kind it is of great importance that theabove-mentioned suction-chamber shall be closed air-tight. In the motorsas heretofore constructed it has not been possible to keep permanentlytight the place at which the crank-shaft passes out of the casing. Thesuccess of these motors is thus interfered with, the output graduallydecreases, since the mixture of gas and air is not the most advantageousone, and eventually the motor can no longer be made to work.

Myinvention is designed to produce an arrangement which prevents leakingof the casing at the bearings without, however, increasing the internalfriction of the motor.

My improved packing is shown, by way of example, in the accompanyingdrawings, in which- Figure 1 is a sectional elevation on the line y y,Fig. 2; and Fig. 2 is asection on the line a; 00, Fig. 1, showing thebearing of a motor fitted with my improvement.

The shaft a of the motor turns in a bearing 6, cast on the crank-casing,which is provided with a metal bush 0. The said shaft to bears thefly-wheel d at its end, and between the bearing Z) and the fly-wheel dis arranged the packing device which forms the subject of my invention.The outside of the bearing is turned smooth, and a flanged collar orwheel 6 is ground or suitably prepared to fit thereto. This collar 6 isof the cross-section shown in Fig. 2 and moves with the shaft a. To makethe joint, a flanged leather washer f is provided, which is pressed intothe collar 6 bya spiral spring 9 and is clamped tightly around the shaftto by means of a strap Serial No. 61,658. (No model.)

72 This strap h is made in two parts and lies in recesses 7;, formed inthe periphery of the flange on the collar 6, and in this manner drivesthe said collar.

The improved packing device is arranged so that the collar 6 restsclosely against the bearing 7) and is pressed against the said bearingby the spring g. In order to tension the spring g, the strap h is pushedforward and is clamped tightly onto the shaft a, with the washer f inbetween, by means of screws I. It will thus be seen that an air-tightconnection is made at three placesviz., between the bearing Z) and thecollar 6, between the leather washerfand the collar 0, and between theleather Washer f and the shaft a. The entrance of air during the drawingin of the mixture and the escape of the mixture during compression arethus entirely precluded. If in the course of time a small space formsbetween the collar (3 and the bearing b, it is only necessary to slackenthe screws Z, to push all the parts forward slightly, and then make theconnection again.

l/Vhat I claim is 1. In combination, a wall or casing, a bearingextending through said wall or casing, a shaft mounted in said bearing,a collar mounted on said shaft and fitted to an end of said bearing, aflanged washer of flexible material on said shaft, a strap securedaround said washer and engaging said collar, and a spring arrangedbetween said strap and the flange on said washer, substantially as, andfor the purpose, hereinbefore described.

2. In combination, a wall or casing, a bearing extending through saidWall or casing, a shaft mounted in said bearing, aflanged collar mountedon said shaft and fitted to an end of said bearing, recesses in theflange on said collar, a flanged washer on said shaft, a divided strapsecured around said washer and engaging the recesses in the flange onsaid collar, tightening-screws for said strap, and a spring arrangedbetween said strap and the flange on said washer, substantially as, andfor the purpose, specified.

3. In combination, a wall or casing, a bearing extending through saidwall or casing, a shaft mounted in said bearing, a flanged collarmounted on said shaft and fitted to an end of said bearing, recesses inthe flange on said collar, a flanged Washer on said shaft, a dil Intestimony whereof I have hereunto set; vided strap secured around saidwasher, lugs my hand in presence of two subscribing witon said strapengaging said recesses, tightenmesses.

ing-serews in the lugs of said strap, and a UDO JURRIEN VAN BERGEN.spiral spring arranged between said strap and I \Vitnesses':

iheflan ze on said Washer, substantially as, THOMAS- HERMANUS VERHAVE,and for the pin-nose, hereinbefore described. JOHANNES D. FUHRINS.

